It sounds like you're agreeing with the article - things work on Linux when you have a deep understanding of them. While it's good to encourage a deep understanding, the group of people using any given OS will always follow a curve of some sort. There will always be beginners; there will always be people who know just enough to be dangerous; there will always be experts.

Requiring everyone to be an expert will prevent Linux from being a dominant OS, because most people do not care enough to gain a deep understanding of any OS, so they'll pick one that's easier to learn the easy bits.